:root {
  --background-black: #191718;
  --background-black-light: #1D1B1C;
  --demo-live-bg: #232122;
  --logo-red: #DF2820;
  --logo-red-dark: #B0201A;
  --logo-red-hover: #E84038;
  --logo-white: #F8FAFC;
  --pinyin-blue: #5EA2FF;
  --gloss-purple: #A07AE6;
  --translation-grey: rgba(248, 250, 252, 0.2);
  --translation-white: rgba(248, 250, 252, 0.85);
  --control-grey: #2A2829;
  --control-grey-mid: #4A4648;
  --control-grey-light: #7C777A;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--background-black);
  color: var(--logo-white);
}

.page {
  width: min(100% - 28px, 560px);
  margin: 0 auto;
  padding: 12px 0 32px;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

header {
  display: flex;
  justify-content: center;
  padding: 16px 0 52px;
}

header img {
  width: clamp(210px, 58vw, 260px);
  max-width: 100%;
  height: auto;
}

main {
  text-align: center;
}

.intro-section p {
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  color: var(--logo-white);
  line-height: 1.35;
}

.demo-section {
  margin: 44px auto 0;
  width: 100%;
  max-width: 460px;
  border: 1px solid var(--control-grey);
  border-radius: 10px;
  background: var(--demo-live-bg);
  overflow: hidden;
}

.demo-segment-area {
  padding: 18px 18px 16px;
  overflow-x: auto;
  scrollbar-width: none;
}

.demo-segment-area::-webkit-scrollbar {
  display: none;
}

.demo-section table {
  border-collapse: separate;
  border-spacing: 12px 2px;
  margin: 0;
  margin-left: -12px;
}

.demo-section td {
  white-space: nowrap;
  padding: 0;
  text-align: center;
  line-height: 1.2;
}

.hanzi {
  font-size: 26px;
  color: var(--logo-white);
  padding-bottom: 2px;
}

.pinyin {
  font-size: 14px;
  color: var(--pinyin-blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  padding-top: 0;
}

.gloss {
  font-size: 13px;
  color: var(--gloss-purple);
  padding-top: 0;
}

.demo-translation-area {
  background: var(--control-grey);
  padding: 14px 18px 16px;
  text-align: left;
}

.demo-timestamp {
  color: var(--translation-grey);
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  margin-bottom: 4px;
}

.translation {
  color: var(--translation-white);
  font-size: 15px;
  line-height: 1.4;
}

.status-section p {
  margin: 52px 0 0;
  font-size: 15px;
  color: #A8A2A4;
}

.status-text {
  background: linear-gradient(
    90deg,
    #A8A2A4 0%,
    #A8A2A4 42%,
    var(--logo-red) 50%,
    #A8A2A4 58%,
    #A8A2A4 100%
  );
  background-size: 250% 100%;
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 7s ease-in-out infinite;
}

@keyframes shimmer {
  0%,
  100% {
    background-position: 100% 0;
  }
  50% {
    background-position: -100% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .status-text {
    animation: none;
  }
}

.signup-section {
  margin-top: 56px;
}

.embeddable-buttondown-form {
  display: flex;
  gap: 8px;
  align-items: stretch;
  margin: 0 auto;
  width: 100%;
  max-width: 380px;
}

.embeddable-buttondown-form input,
.embeddable-buttondown-form button {
  appearance: none;
  height: 44px;
  padding: 0 14px;
  border-radius: 8px;
  font: inherit;
  border: 1px solid var(--control-grey-mid);
}

.embeddable-buttondown-form input[type="email"] {
  flex: 1 1 auto;
  min-width: 0;
  color-scheme: dark;
  background-color: var(--control-grey);
  color: var(--logo-white);
  caret-color: var(--logo-white);
}

.embeddable-buttondown-form input[type="email"]::placeholder {
  color: #968F92;
}

.embeddable-buttondown-form input[type="email"]:focus {
  outline: none;
  border-color: var(--control-grey-light);
}

.embeddable-buttondown-form button {
  flex: 0 0 auto;
  border-color: var(--logo-red-dark);
  background: var(--logo-red-dark);
  color: var(--logo-white);
  font-weight: 600;
  padding: 0 18px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 150ms ease, border-color 150ms ease;
}

.embeddable-buttondown-form button:hover,
.embeddable-buttondown-form button:focus-visible {
  background: var(--logo-red);
  border-color: var(--logo-red);
}

.submit-label-icon {
  display: none;
  font-size: 18px;
  line-height: 1;
}

footer {
  margin-top: auto;
  padding-top: 64px;
  color: #353233;
  text-align: center;
  font-size: 12px;
}

@media (max-width: 480px) {
  header {
    padding: 12px 0 40px;
  }

  .intro-section p {
    font-size: 20px;
  }

  .demo-section {
    margin-top: 32px;
  }

  .hanzi {
    font-size: 24px;
  }

  .embeddable-buttondown-form {
    gap: 6px;
    max-width: 340px;
  }

  .embeddable-buttondown-form input,
  .embeddable-buttondown-form button {
    height: 42px;
  }

  .embeddable-buttondown-form button {
    padding: 0 14px;
    min-width: 52px;
  }

  .submit-label-full {
    display: none;
  }

  .submit-label-icon {
    display: inline-block;
  }
}